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Inventories (Tables)
 12 Months Ended
Dec. 31, 2022
Inventories Abstract  
Schedule of inventories
       
     
    December 31, 2022   December 31, 2021
Finished products        
Iron Solutions   2,126   2,192
Energy Transition Materials   651   582
Other   -   21
    2,777   2,795
         
Work in progress   800   820
Consumable inventory   1,010   857
         
Allowance to net realizable value (i)   (105)   (95)
Total of inventories   4,482   4,377

 

(i) In 2022, the effect of provision for net realizable value was US$44 (2021: US$1).